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Forum Discussion
Balance - Find out how long?
Being new to ReadyNAS there were various things I wanted to know. Of these was how long did each of the 'volume scheduled options' take to run. I have already raised posts about Data Scrubbing, Defr...
I have a ReadyNAS 3130 (Firmware 6.4.0) with Data of 6.39TB and 9.97TB free in a RAID 5. Balance is at 10% and on DAY 3....its causing all types of issues, none of my backups to the NAS are working and tons of alrams (about NAS disconnects) from Veeam One.
This is the first time I clicked Balance, but with my free space I didnt think I was going to have any issues.
On my RN102 I have two 3 TB jbod volumes. I deleted about 500 GB of snapshots on one drive, the other drive didn't use a lot of snapshot space.
The drive with the deleted snapshots took about 30 hours to balance. The other drive took 20 minutes.
How long the balance takes depends on the amount of unused space btrfs finds in the allocated chunks. If the unused space in a chunk is less than a threshold (which I think is set to 61% in 6.4.0) it is skipped. If it is greater than the threshold, then the balance reclaims the space (which is what takes the time).
So the running time depends on the deletions you've done since the previous balance - deletions of snapshots if you have them on, normal deletions if you don't. The RAID level of course can impact performance generally - it doesn't impact balancing specifically.
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